When your boss summons you to his office for a "meeting" with sole purpose of his own education, usually about something he should already know. Essentially, he is trying shamelessly to "download" your brain content, instead of picking up textbooks and learning.

Our regional head Chia Pet called me to another brain dump meeting to ask more questions about Intex. I doubt he learned much.

Coworker 2: What is with all these random songs?
Coworker 1: Not sure, they just keep popping into my head, so I want to share them with you. Once I give them to you, they are no longer in my head. I am not even listening to music today!

3 p.m.:
Coworker 1: "My girl wants to party all the time, party all the time, parrrrty all the timmmme"

Coworker 2: HA HA
Coworker 1: I mean seriously, I must be having a brain dump, getting rid off all the useless songs I have memorized to make room for new information!

Next day:

Coworker 1: What was the song I was signing yesterday? I want to submit to Urban Dictionary.
Coworker 2: I dont remember, the bandaid song and some random song from the 80's. So the brain dump worked?
Coworker 1: Oh my god, it did!